Fetal Genotyping from Maternal Plasma
Laboratory service quick links
Test Catalogue
Testing Schedule
• For RhD, Rhc, RhE and RhC antigens, submit mother’s sample > 16 weeks gestation.
• For K (Kell) antigen, submit mother’s sample > 28 weeks gestation.
Specimen and requisition requirements
Certain test criteria must be met prior to testing. CBS Laboratory Supervisor must be contacted prior to patient sample collection. Refer to
Fetal Genotyping on Maternal Plasma Maternal Fetal Medicine Instructions (PDF)
Label specimen with the required minimum information: patient’s last name, first name, PHN or Unique Lifetime Identifier (ULI) and date of collection.
Requisition must include, as applicable:
- Patient's Last name, First name, Date of Birth and PHN or ULI
- Expected date of delivery (EDD)
- Clinic and Health Care Provider Name. Complete address, phone and fax number
- Phlebotomist ID information
- Date of collection
Download requisitions and related documents:
- International Blood Group Reference Laboratory Requisition DS (PDF) (Use the link to download the Fetal Genotyping from Maternal Blood form FRM4674)
- Fetal Genotyping from Maternal Plasma (PDF) (Electronic Fillable Form)
- Guidance for Completion of International Blood Group Laboratory Requisition
- Fetal Genotyping on Maternal Plasma Collection Site Instructions (PDF)
- Fetal Genotyping on Maternal Plasma Maternal Fetal Medicine Instructions (PDF)
- Consent for Release of Neonatal Test Results Form (PDF)
Pre-shipping storage
Must be kept at room temperature (18-30°C)
Shipping instructions
For shipping instructions refer to Fetal Genotyping on Maternal Plasma Collection Site Instructions
Send to
Canadian Blood Services
Edmonton Centre
8249 114 St NW
Edmonton, AB T6G 2R8
Attention: Diagnostic Services Perinatal Laboratory
Tel: 780-431-8765
Fax: 780-431-8747